Flushing-valve for water-closets.



A. FV. cURTlN. FLUSHING VALVE FOR WATER CLOSETS.

APPLICATION FILED JULY 29. 1918.

Patented NOVI 5, 1918.

@www

lflm.

.ANDREW CURTIN, 0F MEDFORD, MASSACHUSETTS.

FLUSHINGVMVE FOR WATER-CLOSETS.

The present'invention relates to flushing valves for water-closets, and has lfor its object to improve and simplify the construction of such valves so asto increase their leiiiciency and render them positive in action having no parts liable to bind or get out of order, or interfere in any way with the operation of the valve. With this and other objects in view, as will hereinafter appear, the invention consists in the valve described in the following specification and subsequently defined in the claims.

ln the accompanying drawing, which illustrates the preferred embodiment of the invention, the ligure .is a vertical sectional `.view of the improved flushing valve.` The hollow body portion of the valve, which is indicated at 1', is open at the top, and has depending therefrom a spud 2, which is adapted to project through a hole in the lbottom of the flushing tank and is externally threaded for connection with a flushing pipe leading tothe closet bowl. As usual the open top of the valve body constitutes the inlet and the o ening at the lower end of the spud the out et of the valve. A hollow arm. 3 projects laterally from the valve body and 1s provided at the top with a threaded' opening to receive the lower end of an overHow pipe. The tank, the overflow pipe, and the flushing pipe are of the usual type and are not shown in the draw` ing. Surrounding the inlet opening' is van annular valve seat 4 against which avalve proper 5 is adapted to be normally seated. The valve proper comprises a disk 6. secured to the lower threaded end of a hollow valve stem 7 and is provided with a gasket 8, of leather, to insure a water tight joint between the valve and the valve seat. The gasket is heldin place on the under side of the disk by means of a threaded follower 9 screwed onto the projecting end of the valve stem.

Speeieation of Letters Patent.

Application filed July 29, 1918.v VSerial No. 247,090.

hollow float l() which may be of any suitable construction and is provided with a rod 11 which extends vertically therethrough and is threaded lat 12 and 13 for engagement with threaded apertures in the top of the floatandl in a crossbar 14 in the valve stem, respectively. 'lhe threads at 12 and 13 are of the same pitch thus permitting the rod 11 to be screwed into the cross-piece 14: and into the top of the float simultaneously. A' shoulder 15 is rovided on the rod 11, adjacent the threaded portion .12, which bears firmly against the top of the iioat when the rod is screwed into place. The rod extends above the shoulder 15 and is bent sharply at 16 to form a hook adapted to be connected by a lsuitable link or chain to the usual lever by means of which the'valve is operated to flush the bowl. The fioat is contained within a float chamber 17 in which it is adapted to move to control the closing of the valve. The float chamber 17 is supported above the valve by upright arms 18 which rise from a collar 19 internally threaded and screwed onto the body portion of the valve and which serve to guide the upward and downward movements of the valve disk.' The bottom' of the ioat chamber is provided with an opening 20 through which the valve stem passes freely. rlhe top of the chamber is openand the cylindrical side wall thereof vextends below the bottom, providing a skirt 21 which closely surrounds the edge of the valve disk when'it is in wide open position and protects it from the force of the outrush of water. The Side wall extends upwardly a suiicient distance to cause its top edge to be flush with the top of the float when the float is in its highest position. .The normal 4level of the water in the iushing tank is well above the open top of the float chamber and therefore the float chamber is normallyV filled. rlhe opening in the bottom of the ioat chamber is slightly larger than is necessary to permit the movement of the valve stem therethrough in order to permit the gradual escape of the water from the cham'-4 ber after the valve has been opened and water level in the tank has receded below the top of the chamber. Normally the valve is held "seated against the buoyancy of the submerged float by its own weight and the weight of the parts connected therewith and by the pressure of the water in the tank Iupon the valve disk. i

'lhe operation of the device is as follows:

When the closet bowl is to be flushed the valve is lifted in the usual manner, the float is raised to the top of the float chamber and the Water flows down around the float and up through the opening 20 around the valve stem into the bottom of the float chamber. Assoon as the valve is lifted the water in theilushing tank will start to flow down through the valve body and through the flushing pipe to the closet bowl. The buoyancy ofthe float holds the valve open after it has been lifted to its full height. When the tank has been emptied and the bowl has been fiushed the float chamber will still be nearly filled with water and the float will hold the valve disk in raised position temporarily, but as the water escapes from the float chamber through the opening 13 around the valve stem the valve disk will move slowly toward its seat. The l"closing of the valve will therefore be governed entirely by the recedence of the Water in the float chamber and inasmuch ast-he outlet is restricted the water will escape slowly and consequently the valve will move gradually toward its seat. The closing of the valve will thus be delayed until after the water.\ has been emptied from the tank and ampleV time has been allowed for the proper refill of the bowl. Finally the valve disk will be brought gently and noiselessly into engagement with its seat.

The duration of the closing movement of the valve is determined by the area of the outlet of the float chamber which may be so proportioned as to produce the proper amount of retardation. It has been preferred to provide for the escape of the water from the float chamber through the opening 13 around the valve stem as it is desirable to have the valve stem slide loosely through the bottom of the chamber to prevent cramping.

lt will be seen that a slow and gradual closing of the valve and consequently a proper refill of the bowl is secured by the means herein described. The Aretarding means is located entirely outside of the valve body so that there will be no obstruction to the flow of water therethrough. A simple and durable construction has beenprovided in which there are no parts liable to be injured by wear or to get out of order. The possibility of any interference with the effective operation of the valve due to the binding or cramping of parts has been eliminated. The valve may be easily assembled before the float chamber is screwed onto the valve body and the float chamber may be easily removed from the body when desired thus rendering both the oat and the valve disk easily accessible. It is apparent that a valve constructed as above described may be cheaply and easily manufactured.

Having thus described the invention, what is claimed as new is:

A l. A flushing valve for water-closets having, in combination, a hollow body portion having an inlet and an outlet, a valve normally closingsaid inlet, a float connected with the valve, a float chamber in communication with the flushing tank so that the water fills said chamber Vwhen the tank is filled and recedes gradually in said chamber when the tank is emptied to retard the closing of the valve.

2. A. flushing valve for water-closets having, in combination, a hollow body portion having an inlet and an outlet, a valve normally closing said inlet, a float connected with the valve, a float chamber having an inlet through 'which said chamber is filled when the flushing tank is filled and a restricted outlet through which the' water may flow after the water in the tank has receded to a predetermined level, but not in sufficient quantity to permit the closing of the valve until after the tank has been emptied.

` 3.- A flushing valve for water-closetshaving, in combination, a hollow body portion having yan inlet and an outlet, a valve normally closing said inlet, a float connected withthe valve, and a float chamber adapted to be filled with Water and having means governing the closing of the valve independently of the level ofwater in the Hushing tank after the water in the tank has receded below a predetermined level.

4. A flushing valve for 'water-closets having, in combination, a hollow body portion having an inlet and an outlet, a valve ynormally closing said inlet, a float connected with the valve, a float chamber removably secured to said body portion land provided with openings for permitting an unrestricted flow into said chamber after the ushing tank has been flled lto a certain level and a restricted ow from said chamber after the water in the tank has reeeded to a predetermined level.

5. A Hushing valve for water-closets, having, in combination, a hollow body portion having an inlet and an outlet, a valve normally closing said inlet, and vmeans for su porting the valve out of the path of t'e outflowing water when the valve is opened.

ANDREW CUR'llhl'. 

